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Jeans gravitational instability withκ-deformed Kaniadakis distribution in Eddington-inspired Born-Infield gravity
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作者 Wei-Heng Yang Yu-Zhen Xiong +1 位作者 Hui Chen San-Qiu Liu 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第11期219-224,共6页
Based on the framework of Kaniadakis’statistics and its related kinetic theory,the Jeans instability for selfgravitational systems in the background of Eddington-inspired Born-Infield(EiBI)gravity is revisited.A disp... Based on the framework of Kaniadakis’statistics and its related kinetic theory,the Jeans instability for selfgravitational systems in the background of Eddington-inspired Born-Infield(EiBI)gravity is revisited.A dispersion relation generalizing the Jeans modes is derived by modifying the Maxwellian distribution to a family of power law distributions parameterized by the κ parameter.It is established that theκ-deformed Kaniadakis distribution has significant effects on the Jeans modes of the collisionless EiBI-gravitational systems.And as expected,in the limitation κ→0,the corresponding results for Maxwellian case are recovered.The related result in the present work is valuable for the investigations involving the fields of astrophysics such as neutron stars,accretion disks,and relevant plasma physics,etc. 展开更多
关键词 Jeans instability EiBI gravity κ-deformed Kaniadakis distribution
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Entanglement dynamics in κ-deformed spacetime
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作者 Xiaobao Liu Zehua Tian Jiliang Jing 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2024年第10期33-54,共22页
We treat two identical and mutually independent two-level atoms that are coupled to a quantum field as an open quantum system.The master equation that governs their evolution is derived by tracing over the degree of f... We treat two identical and mutually independent two-level atoms that are coupled to a quantum field as an open quantum system.The master equation that governs their evolution is derived by tracing over the degree of freedom of the field.With this,we compare the entanglement dynamics of the two atoms moving with different trajectories inκ-deformed and Minkowski spacetimes.Notably,when the environment-induced interatomic interaction does not exist,the entanglement dynamics of two static atoms inκ-deformed spacetime are reduced to that in Minkowski spacetime in the case that the spacetime deformation parameterκis sufficiently large as theoretically predicted.However,if the atoms undergo relativistic motion,regardless of whether inertial or non-inertial,their entanglement dynamics inκ-deformed spacetime behave differently from that in Minkowski spacetime even whenκis large.We investigate various types of entanglement behavior,such as decay and generation,and discuss how different relativistic motions,such as uniform motion in a straight line and circular motion,amplify the differences in the entanglement dynamics between theκ-deformed and Minkowski spacetime cases.In addition,when the environment-induced interatomic interaction is considered,we find that it may also enhance the differences in the entanglement dynamics between these two spacetimes.Thus,in principle,one can tell whether she/he is inκ-deformed or Minkowski spacetime by checking the entanglement behavior between two atoms in certain circumstances. 展开更多
关键词 quantum entanglement -deformed spacetime relativistic motion environment-induced interatomic interaction quan-tum field theory in curved spacetime
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青藏高原古地震地壳物质变形特征及对盐湖资源开发的影响
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作者 胡东生 张华京 《湖南师范大学自然科学学报》 CAS 1998年第2期80-85,共6页
对青藏高原的地震形变带与寒区冻胀丘及新构造变形特征进行对比分析,并对地震冲击应力矿物的几种新发现的组构型式进行了论述,最后讨论了地震活动及新构造活动对盐湖资源开发的影响.
关键词 古地震 地壳物质 变形特征 盐湖资源 青藏高原
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Contractibility of Hyperspaces C_k(X)
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作者 曹金文 李焱 贾永进 《Chinese Quarterly Journal of Mathematics》 CSCD 2011年第4期526-529,共4页
This paper proves the following results: let X be a continuum, let k, m ∈ N, and let B ∈ C m (X), consider the continuous surjection f k : C k (X) → C k (X). We define the mapping B : C k (X) → C k+m (X): by B (A)... This paper proves the following results: let X be a continuum, let k, m ∈ N, and let B ∈ C m (X), consider the continuous surjection f k : C k (X) → C k (X). We define the mapping B : C k (X) → C k+m (X): by B (A) = f k (A) B. Then following assertions are equivalent: (1) The hyperspace C k (X) is g-contractible; (2) For each m ∈ N and for each B ∈ C m (X) the mapping B is a W -deformation in C k+m (X); (3) For each m ∈ N there exists B ∈ C m (X) such that the mapping B is a W -deformation in C k+m (X); (4) There exists m ∈ N such that for each B ∈ C m (X) the mapping B is a W -deformation in C k+m (X); (5) There exist m ∈ N and B ∈ C m (X) such that the mapping B is a W -deformation in C k+m (X). 展开更多
关键词 CONTINUUM HYPERSPACES g-contractible W -deformation mapping
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